libavcodec/codec_desc.c: move AVCodecDescriptors to proper location

I had assumed the DSMCC_B descriptor was in the proper location.
It is not, so neither are the others.  Put them in the correct order,
matching the order of the enum AVCodecID so the binary search finds
them correctly.

mythtv/external/FFmpeg/libavcodec/codec_desc.c

@@ -3400,6 +3400,24 @@ static const AVCodecDescriptor codec_descriptors[] = {
         .props     = AV_CODEC_PROP_TEXT_SUB,
         .profiles  = NULL_IF_CONFIG_SMALL(ff_arib_caption_profiles),
     },
+    {
+        .id        = AV_CODEC_ID_MPEG2VBI,
+        .type      = AVMEDIA_TYPE_DATA,
+        .name      = "mpeg2vbi",
+        .long_name = NULL_IF_CONFIG_SMALL("ivtv proprietary embedded VBI captions"),
+    },
+    {
+        .id        = AV_CODEC_ID_DVB_VBI,
+        .type      = AVMEDIA_TYPE_DATA,
+        .name      = "dvb_vbi",
+        .long_name = NULL_IF_CONFIG_SMALL("dvb teletext"),
+    },
+    {
+        .id        = AV_CODEC_ID_DSMCC_B,
+        .type      = AVMEDIA_TYPE_DATA,
+        .name      = "dsmcc_b",
+        .long_name = NULL_IF_CONFIG_SMALL("DSMCC B"),
+    },
 
     /* other kind of codecs and pseudo-codecs */
     {
@@ -3461,24 +3479,6 @@ static const AVCodecDescriptor codec_descriptors[] = {
         .name      = "dvd_nav_packet",
         .long_name = NULL_IF_CONFIG_SMALL("DVD Nav packet"),
     },
-    {
-        .id        = AV_CODEC_ID_MPEG2VBI,
-        .type      = AVMEDIA_TYPE_DATA,
-        .name      = "mpeg2vbi",
-        .long_name = NULL_IF_CONFIG_SMALL("ivtv proprietary embedded VBI captions"),
-    },
-    {
-        .id        = AV_CODEC_ID_DVB_VBI,
-        .type      = AVMEDIA_TYPE_DATA,
-        .name      = "dvb_vbi",
-        .long_name = NULL_IF_CONFIG_SMALL("dvb teletext"),
-    },
-    {
-        .id        = AV_CODEC_ID_DSMCC_B,
-        .type      = AVMEDIA_TYPE_DATA,
-        .name      = "dsmcc_b",
-        .long_name = NULL_IF_CONFIG_SMALL("DSMCC B"),
-    },
     {
         .id        = AV_CODEC_ID_TIMED_ID3,
         .type      = AVMEDIA_TYPE_DATA,